David F. Cook was foreman of the northern section, the sheep operation, of the Warren Live Stock Company south of Cheyenne, Wyoming, from 1921 to 1962. Warren Livestock was owned by Senator Francis E. Warren. During his time as foreman, Cook was active in the sheep industry and spent much time in Australia, New Zealand and the Orient. He also authored three children's books, a book about the history of the Warren Live Stock Company, and numerous articles and talks.
From the description of David F. Cook papers, 1917-1991. (University of Wyoming, American Heritage Center). WorldCat record id: 61708532